You make an interesting point, but don't forget that the Dev is planning to have a market to sell genesis addresses. So in essence, you could cash out any time before those 60 years.
To play devil's advocate: how much would an investor be willing to pay for the generic address, when the maturity date for the investment is sixity years? Even if your believe (as most of us do) that crypto currency is the way of the future, is ART going to be relevant for 60 years into the future? It's difficult to say yes with any certainty. Even now there are hundreds of other alt-coins flooding the market. Who would want to commit that long and buy the generic address at a high a price?
It's not important 1, 10 or 60 year. All investors are in the same conditions.
For example if we have 1 million tokens, 1 year and price 1$ after 1 month (total tokens 83k, market cap is 83k $),
then for 10 years period after 1 month we will have 10$ price (total tokens 8.3k, but market cap sure will be same 83k $ and price 10$ case in this case it's a rare token and low supply).
Just simple math.
Difference is only speed of price change cause inflation.
The real question in regards to supply is whether they decide to increase the algorithm difficulty as time goes on. It would be a much more ideal situation for the investors if you got ART mined at a decreased rate every month (such as bitcoin), that way you get more ART at the beginning when it is more valuable rather than the end when most people probably have moved on. This also makes the coin more scarce (increasing the coins value) as time goes on. A major reason for Bitcoins rise in price was the increasing algorithm difficulty along with a relatively small (21 million) maximum cap on total circulation. If we get the same amount of ART every month we mine it, it's bad news bears for those who bought at the ICO.
It seems this wil be an fonctionality of art..yu can check this in wp.
I'll check it out. Thanks.